Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Analysis of the elliptical shooting trajectory for tuna purse seine

참치선망어선의 타원형 투망궤적 분석

  • LEE, Da-Yun (Department of Fisheries Physics, Pukyong National University) ;
  • LEE, Chun-Woo (Division of Marine Production System Management, Pukyong National University) ;
  • CHOI, Kyusuk (Department of Fisheries Physics, Pukyong National University) ;
  • JANG, Yongsuk (Department of Fisheries Physics, Pukyong National University)
  • 이다윤 (부경대학교 수산물리학과) ;
  • 이춘우 (부경대학교 해양생산시스템관리학부) ;
  • 최규석 (부경대학교 수산물리학과) ;
  • 장용석 (부경대학교 수산물리학과)
  • Received : 2020.02.12
  • Accepted : 2020.02.26
  • Published : 2020.02.28
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Abstract

In the previous study, a shooting trajectory assuming that the purse seine shooting trajectory is a circle was proposed based on the speed and direction of the movement of the fish school. However, in practice, a trajectory that is closer to an elliptical shape than a circular one is often formed. In this study, the existing circular trajectory and the elliptical trajectory methods were compared under the same conditions to confirm the effectiveness of elliptical shooting trajectory. In addition, changes in the eccentricity of ellipses were derived to assess which type of ellipse was appropriate as a shooting trajectory. When a high-speed fish school moves in a straight line, an elliptical shooting trajectory with the eccentricity of 0.7 to 0.9 will be reasonable, and for middle-low speed fish school, an elliptical shooting trajectory with the eccentricity of 0.4 to 0.6 will be more useful than a circle shooting trajectory.

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References

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